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Screw Threads for MK1 Concentric Carbs

Classic Norton Commando Motorcycles.

Screw Threads for MK1 Concentric Carbs

Postby thunderbolt » Wed Sep 13, 2017 3:47 am

Hi there,

Can someone tell me the thread form and size for the various screws on the Amal Concentric MK1? Top cap screws, mixture & throttle stop screws and float bowl screws.

Thanks

Don

PS: Oh and the cable adjusters in the carb tops.

Thanks

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Re: Screw Threads for MK1 Concentric Carbs

Postby kommando » Wed Sep 13, 2017 5:32 am

Most of them are 2BA, not sure what the cable adjusters are.
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Re: Screw Threads for MK1 Concentric Carbs

Postby L.A.B. » Wed Sep 13, 2017 6:14 am

kommando wrote:not sure what the cable adjusters are.


7/32" - 40 ME.

The banjo bolt is 3/8 - 26 Cycle.
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Re: Screw Threads for MK1 Concentric Carbs

Postby thunderbolt » Thu Sep 14, 2017 4:28 am

Thanks guys, Can I confirm the mixture screw and throttle stop screws are 2BA thread?

Thanks
Don

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Re: Screw Threads for MK1 Concentric Carbs

Postby kommando » Thu Sep 14, 2017 5:36 am

Yes, both 2BA.
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